automatic refresh webread data

Question

roberto 2023-2-13

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1911570-automatic-refresh-webread-data

评论： Jonas 2023-2-26

hello everybody

I have a webread data (XXX are confidential):

https://api.XXXXXXXX.com/time_series?apikey=XXXXXXXX&interval=1min&symbol=EUR/USD&timezone=Europe/Rome&end_date=2023-02-14 09:37:00&start_date=2023-02-13 09:37:00&format=CSV')

that I save as table in workspace and analyze it.

how can I get an automatic refresh every 1 minute to this url without copy and launch it manually on command window?

tks very much

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Answer 1

Jonas 2023-2-13

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1911570-automatic-refresh-webread-data#answer_1170415

编辑：Jonas 2023-2-13

在 MATLAB Online 中打开

create a timer object, use a method for repeated execution and add the callback

EDIT:

e.g.

function doStuff()
intervalInS=10;
myData=[];
everyNowAndThen = timer("Period",intervalInS,"ExecutionMode","fixedRate","TimerFcn",@refresh);
everyNowAndThen.start();
function refresh(~,~)
    myData=webread('https://de.mathworks.com/help/daq/troubleshooting-tips.html');
    disp('next one')
end
end

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roberto 2023-2-21

编辑：roberto 2023-2-21

在 MATLAB Online 中打开

with this little change the code works and refreshes on command window.

ans =

1000×5 table (answer on command window)

but the problem is that the workspace is empty..no ans in table format...

here the code (so far tks to Jonas. I've replaced his "display"):

function doStuff()
intervalInS=60;
myData=[];
everyNowAndThen = timer("Period",intervalInS,"ExecutionMode","fixedRate","TimerFcn",@refresh);
everyNowAndThen.start();
function refresh(~,~)
    myData=webread('https://api......CSV');
    webread('https://api........CSV')
end
end